[coreboot-gerrit] Patch set updated for coreboot: soc/apollolake: Pass earliest timestamp to timestamp_init

[Alexandru Gagniuc (alexandrux.gagniuc@intel.com)]

Alexandru Gagniuc (alexandrux.gagniuc at intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/14863

-gerrit

commit 18234fdaf6a615e460082d8a22b035e0ec074c00
Author: Alexandru Gagniuc <alexandrux.gagniuc at intel.com>
Date:   Mon May 16 16:27:45 2016 -0700

    soc/apollolake: Pass earliest timestamp to timestamp_init
    
    We have a timestamp from before cache-as-ram setup saved in the MMX
    registers. Recover that timestamp, and use it as the base timestamp
    rather than letting lib/bootblock.c use a late timestamp.
    
    This allows more accurate profiling of the boot flow, since CAR setup
    time is no longer excluded from the timing information.
    
    Change-Id: I055092c600438c5260ab67509434a38f1eb77fe4
    Signed-off-by: Alexandru Gagniuc <alexandrux.gagniuc at intel.com>
---
 src/soc/intel/apollolake/bootblock/bootblock.c    | 7 ++++++-
 src/soc/intel/apollolake/bootblock/cache_as_ram.S | 6 ++++++
 src/soc/intel/apollolake/include/soc/bootblock.h  | 2 +-
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/soc/intel/apollolake/bootblock/bootblock.c b/src/soc/intel/apollolake/bootblock/bootblock.c
index 833f531..d423fbb 100644
--- a/src/soc/intel/apollolake/bootblock/bootblock.c
+++ b/src/soc/intel/apollolake/bootblock/bootblock.c
@@ -3,6 +3,7 @@
  *
  * Copyright (C) 2016 Intel Corp.
  * (Written by Andrey Petrov <andrey.petrov at intel.com> for Intel Corp.)
+ * (Written by Alexandru Gagniuc <alexandrux.gagniuc at intel.com> for Intel Corp.)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -25,6 +26,7 @@
 #include <soc/northbridge.h>
 #include <soc/pci_devs.h>
 #include <soc/uart.h>
+#include <timestamp.h>
 
 static const struct pad_config tpm_spi_configs[] = {
 	PAD_CFG_NF(GPIO_106, NATIVE, DEEP, NF3),	/* FST_SPI_CS2_N */
@@ -36,7 +38,7 @@ static void tpm_enable(void)
 	gpio_configure_pads(tpm_spi_configs, ARRAY_SIZE(tpm_spi_configs));
 }
 
-void asmlinkage bootblock_c_entry(void)
+void asmlinkage bootblock_c_entry(uint32_t tsc_hi, uint32_t tsc_lo)
 {
 	device_t dev = NB_DEV_ROOT;
 
@@ -49,6 +51,9 @@ void asmlinkage bootblock_c_entry(void)
 	pci_write_config32(dev, PCI_BASE_ADDRESS_1, 0);
 	pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
 
+	/* Initialize timestamps with the earliest timestamp available. */
+	timestamp_init(((uint64_t)tsc_hi << 32) | tsc_lo);
+
 	/* Call lib/bootblock.c main */
 	main();
 }
diff --git a/src/soc/intel/apollolake/bootblock/cache_as_ram.S b/src/soc/intel/apollolake/bootblock/cache_as_ram.S
index cd301ac..f19cb71 100644
--- a/src/soc/intel/apollolake/bootblock/cache_as_ram.S
+++ b/src/soc/intel/apollolake/bootblock/cache_as_ram.S
@@ -129,6 +129,12 @@ car_init_done:
 before_carstage:
 	post_code(0x2b)
 
+	/* Restore the timestamp from bootblock_crt0.S (mm2:mm1) */
+	movd	%mm1, %eax
+	push	%eax
+	movd	%mm2, %eax
+	push	%eax
+
 	/* We can call into C functions now */
 	call bootblock_c_entry
 
diff --git a/src/soc/intel/apollolake/include/soc/bootblock.h b/src/soc/intel/apollolake/include/soc/bootblock.h
index 2312487..9ce9231 100644
--- a/src/soc/intel/apollolake/include/soc/bootblock.h
+++ b/src/soc/intel/apollolake/include/soc/bootblock.h
@@ -16,5 +16,5 @@
 #define _SOC_APOLLOLAKE_BOOTBLOCK_H_
 #include <arch/cpu.h>
 
-void asmlinkage bootblock_c_entry(void);
+void asmlinkage bootblock_c_entry(uint32_t tsc_hi, uint32_t tsc_lo);
 #endif